3beta,5beta-epoxy-a-norandrostane-2-ones



United States Patent 3,449,376 35,55-EPOXY-A-NORANDROSTANE-2-ONES Seymour D. Levine, North Brunswick, N.J., assignor, by mesne assignments, to E. R. Squibb & Sons, Inc., New York, N.Y., a corporation of Delaware No Drawing. Original application Mar. 8, 1965, Ser. No. 438,042, now Patent No. 3,361,824, dated Jan. 2, 1968. Divitzied and this application June 15, 1967, Ser. No. 646, 00

Int. Cl. C07c 171/06, 173/00; A61k 2.7/00 US. Cl. 260348 7 Claims ABSTRACT OF THE DISCLOSURE This invention relates to new 17 oxygenated 35,55- epoxy A norandrostane 2 ones, which are useful as intermediates in the preparation of the corresponding 3 halo 17 oxygenated A nor A androstene- 2 ones, to which they are converted by treatment with a hydrogen halide. The 35,55 epoxides are formed by treating the corresponding 17 oxygenated A nor- A androstene 2 ones with hydrogen peroxide.

This application is a division of my application, Ser. No. 438,042, filed'Mar. 8, 1965, Now Patent No. 3,361,- 824, granted Jan. 2, 1968.

This invention relates to new chemical compounds and more particularly to new steroidal substances and their method of preparation.

The new steroids of this invention can be depicted by the Formula I:

wherein R is as hereinbefore defined, with hydrogen Ice peroxide to yield, interalia, new intermediates of this invention of the Formula III:

III

wherein R and R aare as hereinbefore defined.

These new intermediates are then interacted with a hydrogen halide, preferably hydrogen chloride and hydrogen bromide, to yield the final products of this invention of the Formula I.

The suitable starting steroidal materials are A nortestosterone and 17oz methyl A nortestosterone. These compounds on treatment with hydrogen peroxide yield, inter alia, 35,55 epoxy A norandrostane-Z- one 175 01 and 35,55 epoxy 17a methyl A norandrostane 2 one 175 01, respectively. To prepare the other new intermediates of Formula III of this invention, either 35,55 epoxy A norandrostane 2 one- 175 01 is oxidized by treatment with chromium trioxide to yield 35,55 epoxy A norandrostane 2,17 dione; or 35,55 epoxy A norandrostane 2 one 175 01 or 35,55 epoxy 17cc methyl A norandrostane-Z- one 175 01 is treated with an acid anhydride or acyl halide of the desired acid to yield the 175 ester derivative. Among the suitable acid anhydrides and acyl halides, those preferred are the anhydrides or acyl chlorides of hydrocarbon carboxylic acids of less than twelve carbon atoms, as exemplified by the lower alkanoic acids (e.g., acetic, propionic, butyric and hexanoic acid), the lower alkenoic acids, the monocyclic aryl carboxylic acids (e.g., benzoic acid), the monocyclic aryl lower alkanoic acids (e.g., phenacetic and 5 phenylproprionic acid), the monocyclic cycloalkanecarboxylic acids, the monocyclic cycloalkenecarboxylic acids, the monocyclic cycloalkane lower alkanoic acids, and the monocyclic cycloalkane lower alkenoic acids.

The resulting compounds of Formula II are then reacted with a hydrogen halide to yield the final products of this invention. If a free 175 hydroxy starting material is used when R is hydrogen and the reaction is carried out in the presence of glacial acetic acid as the solvent, the compound obtained is in the form of its 17- acetate. If, however, the reaction is conducted in an inert solvent, such as chloroform and/or ethanol, then the final product is obtained in its free 175-hydroxy form.

The following examples illustrate the invention (all temperatures being in centigrade):

EXAMPLE 1 3 5,5 5-epoxy-A-norandrostane-2-one- 1 -01 A solution of 2 g. of A-nortestosterone in 20 ml. of methanol is treated with 8 ml. of 30% hydrogen peroxide solution and 4 ml. of aqueous 4 N sodium hydroxide solution and left at room temperature for 16 hours. The reaction mixture is diluted with water and extracted five times with ether. The ether extracts are wased with 8% salt solution, dried over sodium sulfate and evaporated to dryness. Plate chromatography of the residue using silica gel as the adsorbent and chloroform containing 2% methanol as the developing solvent gives two bands detectable with iodine which are eluted with ethyl acetate. Crystallization of the residue from the less polar band from isopropyl ether gives 35,55-epoxy-A-norandrostane- 2-one-17fi-ol having a melting point of about 143.5- 144.5 The analytical sample is prepared by recrystallization from isopropyl ether, M.P. about 144-145 [M +102 (chf.);

)rfjfi, 2.83 and 5.77 1.

1 Si(CH 9.22 (s., 18=Me), 8.82 (s., l9=Me), 7.88 (s., l CH 6.87 (m., 3 H) and 6.39 (m., l7=H).

Analysis.-Calcd. for C H O (290.39): C, 74.44; H, 9.03. Found: C, 74.35; H, 8.85.

EXAMPLE 2 l7a-methyl-3pi,5l3-epoxy-A-norandrostane-Z-one-l7t3-ol Following the procedure of Example 1 but substituting 17a-methyl-A-nortestosterone for the A-nortestosterone, there is obtained 17a-methyl-35,5;3-epoxy-A-norandrostane-2-one-l7fi-ol.

EXAMPLE 3 319,5fi-epoxy-A-norandrostane-2,17-dione A solution of 250 mg. of 3 8,5/8-epoxy-A-norandrostane- 2-one-17/3-ol in 10 ml. of acetone is treated dropwise with stirring with a slight excess of chromium trioxide-sulfuric acid. Ethanol is added to decompose excess oxidizing agent and the acetone layer is decanted. The inorganic residue is washed with additional acetone. The acetone fractions are combined and evaporated to dryness to give 3,8,5fiepoxy-A-norandrostane-2,17-dione.

EXAMPLE 4 36,5 fi-epoxy-A-norandrostane-Z-one-1718-01 acetate A mixture of 100 mg. of 3p,5B-epoxy-A-norandrostane- 2-one-17B-ol, 0.1 ml. of pyridine, and 1 ml. of acetic anhydride is left at room temperature for 16 hours. The reaction mixture is poured into ice-Water and extracted with ether. The ether extracts are wased with a saturated sodium bicarbonate solution, 8% salt solution, dried over sodium sulfate and evaporated to dryness to yield 35,519- epoxy-A-norandrostane-Z-one-175-01 acetate.

In a similar manner, by substituting any other acid anhydride for the acetic anhydride in the procedure of Example 4, the corresponding ester is formed.

EXAMPLE 5 17a-methyl-3fi,5B-epoxy-A-norandrostane-2-onel7 3-ol acetate A solution of 0.0033 ml. of perchloric acid in 0.3 ml. of acetic anhydride is added to 500 mg. of l7u-methyl-3/3,SB- epoxy-A-norandrostane-Z-one-175-01 in ml. of acetic anhydride. The reaction mixture is stirred at room temperature for 30 min. and then poured into ice-water and extracted with chloroform. The chloroform extracts are washed with a saturated sodium bicarbonate solution, 8% salt solution, dried over sodium sulfate and evaporated to dryness to give l7a-methyl-3fi,5fl-epoxy-A-norandostane-2-one-1718-ol acetate.

In a similar manner, by substituting any other acid anhydride for the acetic anhydride in the procedure of Example 5, the corresponding ester is formed.

EXAMPLE 6 3-chloro-A -A-norandrostene-Z-orte-l7/i-ol acetate A solution of 150 mg. of 3 8,55-epoxy-A-norandrostane- 2-one-l7/3-ol in 10 ml. of glacial acetic acid is sautrated with hydrogen chloride gas and refluxed for 10 hours. The reaction mixture is concentrated and the residue taken up in chloroform. The chloroform solution is washed with saturated sodium bicarbonate solution, 8% salt solution, dried over sodium sulfate and evaporated to dryness to give 3 chloro A -A-norandrostene-2-one-1713-01 acetate. The analytical sample is prepared by recrystallization from 4 acetone-hexane, M.P. about 175-177; +26 (chi);

m 5.80 and 6.13m

A EtOH 246 m, (13,400); 1- Si(CH 9.14 (s., 18=Me), 8.78 (s., 19=Me), 7.95 (s., l7=acetate), and 5.39 (m., 17:11).

Analysis.-Calcd. for C H O Cl (350.87): C, 68.46; H, 7.76. Found: C, 68.35; H, 7.77.

EXAMPLE 7 3-chloro-A -A-norandrostene-2-one-l7ti-ol A solution of mg. of 3 8,SB-epoxy-A-norandrostane- 2-one-l7/3-ol in 9 ml. of chloroform and 1 ml. of ethanol is saturated with hydrogen chloride gas and refluxed for 8 hours. The reaction mixture is washed with saturated sodium bicarbonate solution, 8% salt solution, dried over sodium sulfate and evaporated to give 3-chloro-A -A- norandrostene-Z-one--01.

Similarly, by substituting 17-esters for the free 17- hydroxy compound in Example 7, the corresponding esters of 3-chloro-A A-norandrostene-Z-one-1713-01 are formed.

EXAMPLE 8 l7a-methyl-3-chloro-A -A-norandrostene-Z-one-1713-01 Following the procedure in Example 7 but substituting 17oz methyl 3B,Sfl-epoxy-A-norandrostane-Z-one-17/3-01 for 3 B,fi-epoxy-A-norandrostane-2-one-17B-ol there is obtained 17a methyl-3-chloro-A -A-norandrostene-Z-one- 175-01.

EXAMPLE 9 17a-methyl-3-chloro-A -A-norandrostene-2-one- 17fi-ol 17-acetate Following the procedure of Example 7, but substituting 17a methyl 3B,5fl-epoxy-A-norandrostane-Z-one-l7B-ol acetate for the steroid reactant, there is obtained 17::- methyl 3 chloro A A-norandrostene-Z-one-17 3-01 17- acetate.

EXAMPLE 10 3-chloro-A -A-norandrostene-2,17-dione Following the procedure of Example 7, but substituting 3B,SB-epoxy-A-norandrostane-2,17-dione for the steroid reactant, there is obtained 3-chloro-A -A-norandrostene- 2,17-dione.

- EXAMPLE 11 3-bromo-A -A-norandrostene-Z-one-175-01 acetate wherein R is selected from the group consisting of hydrogen and methyl, R is selected from the group consisting of 5 hydroxy and the acyloXy radical of a hydrocarbon carboxylic acid of less than twelve carbon atoms, and together R and R is keto.

2. 3,8,Sfl-epoxy-A-norandrostane-Z-one-175-01. 3. An ester of 3B,SB-epoxy-A-norandrostane-2-one-175- 01 and a hydrocarbon carboxylic acid of less than twelve car-hon atoms.

stane-2-one-17fl-o1 and a hydrocarbon carboxylic acid of less than twelve carbon atoms.

7. 313-55-epoxy-A-norandrostane-Z,17-dione.

References Cited UNITED STATES PATENTS 3,309,398 3/1967 Kerwin 260348 X NORMA S. MILESTONE, Primary Examiner.

U.S. Cl. X.R. 

